Bookcase



FIG. 1 is a front perspective view of the bookcase of the present invention showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken lines are for the purpose of illustrating the environment of the article only and form no part of the claimed design. 

CLAIM The ornamental design for a bookcase, as shown and described. 